3. Open and close windows at different times of day
Open windows can let fresh air in, helping your home stay cool on hot days. But if the outside temperature is soaring, opening your windows can also let in heat.
Keep windows closed when the temperature outside is hotter than inside. You can use fans or air conditioning to lower the inside temperature. Trap the cool air inside by keeping the windows sealed.
Open windows when the temperature inside is hotter than outside, usually in the early morning or late evening, letting the cooler air circulate.
Opening multiple windows can create cross ventilation, where fresh air enters through one window and flows through the space out of another, helping to cool your home.